BBC
US marine theme park SeaWorld has announced it is to build a bigger tank for its killer whales, amid criticism of its treatment of the animals.
But the Florida company said that the plans were not in response to last year's documentary film "Blackfish".
The film suggested that captivity and SeaWorld's treatment provoked violent behaviour in the killer whales.
The high profile death of a trainer in front of a live audience in 2010 sparked worldwide outrage.
SeaWorld CEO Jim Atchinson said in a statement on Friday that the new tank, to be completed by 2018, would "transform how visitors experience killer whales".